GB1180200A - Improvements in or relating to Feedback Amplifier Systems - Google Patents
Improvements in or relating to Feedback Amplifier SystemsInfo
- Publication number
- GB1180200A GB1180200A GB61505/68A GB6150568A GB1180200A GB 1180200 A GB1180200 A GB 1180200A GB 61505/68 A GB61505/68 A GB 61505/68A GB 6150568 A GB6150568 A GB 6150568A GB 1180200 A GB1180200 A GB 1180200A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- input
- network
- resistive
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
- H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/28—Impedance matching networks
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
1,180,200. Negative feedback amplifying circuits. SIEMENS A.G. 26 July, 1967 [27 July, 1966], No. 61505/68. Divided out of 1,178,039. Heading H3T. In an amplifier having a first negative feedback path in series with both the input and output circuits of the amplifier, and a second negative feedback path in parallel with both the input and output circuits of the amplifier, the first feedback path takes the form of a twoterminal device #s comprising resistance and reactance in parallel, while the second feedback path is in the form of a T-network # 1 , # 2 , # p , at least one of the series arms of which is resistive: the shunt arm of the T-network is reactive and the ratio of its reactance to the reactance of the two terminal device is made less by 1 than the ratio of the resistance of the said one series arm and the resistance of the two-terminal network. It is shown in the Specification that if (1) the amplifier is terminated in a resistive load Z A and the input series arm # 1 of the T- network is resistive and dimensioned in the manner specified, the input impedance WE of the amplifier may be made real and frequency independent and equal to the resistance of the two-terminal device. The output series arm # 2 may then be reactive and chosen to provide a desired frequency response without affecting the input impedance of the amplifier. If, alternatively (2) the amplifier input source impedance R g is resistive and the output series arm # 2 of the T-network is resistive and dimensioned in the manner specified, the output impedance W A of the amplifier may be made real and frequency independent. The input series arm # 1 may then be made reactive to provide a desired frequency response without affecting the output impedance of the amplifier. An amplifier stage of the first type may be followed by one of the second type by the interposition of a buffer stage which may comprise a grounded-emitter transistor stage with heavy negative feedback.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES105029A DE1272998B (en) | 1966-07-27 | 1966-07-27 | Amplifier arrangement with parallel and series feedback from the output to the input |
DES105024A DE1272997B (en) | 1966-07-27 | 1966-07-27 | Amplifier arrangement with parallel and series feedback from the output to the input |
DES0108803 | 1967-03-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1180200A true GB1180200A (en) | 1970-02-04 |
Family
ID=27212983
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB61506/68A Expired GB1179520A (en) | 1966-07-27 | 1967-07-26 | Improvements in or relating to Feedback Amplifier Systems |
GB34206/67A Expired GB1178039A (en) | 1966-07-27 | 1967-07-26 | Improvements in or relating to Feedback Amplifier Systems |
GB61505/68A Expired GB1180200A (en) | 1966-07-27 | 1967-07-26 | Improvements in or relating to Feedback Amplifier Systems |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB61506/68A Expired GB1179520A (en) | 1966-07-27 | 1967-07-26 | Improvements in or relating to Feedback Amplifier Systems |
GB34206/67A Expired GB1178039A (en) | 1966-07-27 | 1967-07-26 | Improvements in or relating to Feedback Amplifier Systems |
Country Status (7)
Country | Link |
---|---|
AT (2) | AT279673B (en) |
BE (1) | BE701911A (en) |
DE (3) | DE1272998B (en) |
GB (3) | GB1179520A (en) |
NL (1) | NL148460B (en) |
SE (1) | SE343737B (en) |
YU (1) | YU35410B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3972002A (en) * | 1974-12-30 | 1976-07-27 | Bell Telephone Laboratories, Incorporated | Dual feedback amplifier |
-
1966
- 1966-07-27 DE DES105029A patent/DE1272998B/en not_active Withdrawn
- 1966-07-27 DE DES105024A patent/DE1272997B/en not_active Withdrawn
-
1967
- 1967-03-14 DE DE19671512765 patent/DE1512765A1/en active Pending
- 1967-07-17 NL NL676709907A patent/NL148460B/en unknown
- 1967-07-24 AT AT07607/68A patent/AT279673B/en not_active IP Right Cessation
- 1967-07-24 AT AT685567A patent/AT285676B/en active
- 1967-07-24 YU YU1476/67A patent/YU35410B/en unknown
- 1967-07-26 GB GB61506/68A patent/GB1179520A/en not_active Expired
- 1967-07-26 SE SE10870/67*A patent/SE343737B/xx unknown
- 1967-07-26 GB GB34206/67A patent/GB1178039A/en not_active Expired
- 1967-07-26 GB GB61505/68A patent/GB1180200A/en not_active Expired
- 1967-07-27 BE BE701911D patent/BE701911A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
NL6709907A (en) | 1968-01-29 |
YU35410B (en) | 1980-12-31 |
SE343737B (en) | 1972-03-13 |
NL148460B (en) | 1976-01-15 |
DE1272998B (en) | 1968-07-18 |
YU147667A (en) | 1980-06-30 |
BE701911A (en) | 1968-01-29 |
GB1179520A (en) | 1970-01-28 |
GB1178039A (en) | 1970-01-14 |
AT285676B (en) | 1970-11-10 |
DE1272997B (en) | 1968-07-18 |
AT279673B (en) | 1970-03-10 |
DE1512765A1 (en) | 1969-08-14 |
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